26223836640 has 192 divisors, whose sum is σ = 83317248000. Its totient is φ = 6933049344.

The previous prime is 26223836623. The next prime is 26223836669. The reversal of 26223836640 is 4663832262.

It is a junction number, because it is equal to n+sod(n) for n = 26223836592 and 26223836601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43779061 + ... + 43779659.

It is an arithmetic number, because the mean of its divisors is an integer number (433944000).

Almost surely, 2^26223836640 is an apocalyptic number.

26223836640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26223836640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41658624000).

26223836640 is an abundant number, since it is smaller than the sum of its proper divisors (57093411360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26223836640 is a wasteful number, since it uses less digits than its factorization.

26223836640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249 (or 1241 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 42.

The spelling of 26223836640 in words is "twenty-six billion, two hundred twenty-three million, eight hundred thirty-six thousand, six hundred forty".